WORK PLANS - Laserfiche WebLink

Home Browse Search

06 January 2017 AGE-NC Project No. 01-0877 Page 4 of 6 3.1. DRILLING ACTIVITIES The following procedures will be performed prior to any digging/drilling activities: • Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities - Prepared by National Institute for Occupational Safety and Health, Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, October 1985. • Notify the RWQCB and SJCEHD a minimum of 72 hours prior to commencement of any work, following the date of issue for drilling and/or well permits. • All drilling locations will be marked at least 48 hours in advance for an Underground Service Alert (USA) check of underground utilities or pipes. 3.1.1. Soil-Vapor Boring Advancement and Sampling Soil borings SV-1 through SV-3 will be advanced utilizing a 4-inch diameter stainless steel hand auger. Upon reaching the total depths, soil borings SV-1 through SV-3 will be converted into semi-permanent soil-vapor point using a six-inch long vapor implant attached to %-inch diameter Teflon tubing. The implant and tubing will be lowered to the total depth of each boring (i.e. 6 ft) and filter pack material consisting of#2/12 sand will be placed from the bottom of the borehole to approximately one-foot above the vapor implant(i.e. 5-6'h ft). Following filter placement, approximately '/2 foot of dry granular bentonite will be placed above the filter pack (i.e. 4 '/2 - 5 ft). The remainder of the void space between the tubing and the open borehole will be filled with a neat cement with 1-5% bentonite content at depths between '/2 - 4'/2 feet bsg. The as-built construction of the soil-vapor sampling well is depicted in Figure 5. 3.1.2. Soil Sampling Soil samples will be collected at 5 feet bsg from soil borings SV-1 through SV-3 utilizing a 4-inch diameter hand auger. Each soil sample will be placed directly into a 6-inch brass sleeve. The exposed ends of each brass sleeve will be covered with Teflon sheets, capped, and sealed with tape. Each soil sample will be visually logged and classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS). Additionally, soil samples will be field screened for the presence of volatile organic compounds using an organic vapor meter (OVM), equipped with a photo-ionization detector (PID). Soil sample descriptions and OVM readings will be recorded on a log for each soil boring. AAvtrnced GeoEncironmenlal,Ine.